Sewing machine lighting fixture



July 12, 1938. w. o. LANGILLE SEWING MACHINE LIGHTING FIXTURE Filed Fat20, .1937 2 Sheets-Sheet 1 July 12, 1938. w O LANGlLLE 2,123,483

SEWING MACHINE LIGHTING FIXTURE Filed Feb. 20, 1937 2 Sheets-Sheet 2Patented July 12, 1938 PATIENT. OFFICE SEWING MACHINE LIGHTING FIXTUREWilfred o. Langille, Chester, N. 1., assignor to The SingerManufacturing Company, Elizabeth, N. J., a corporation of New JerseyApplication February 20, .1937, Serial No. 126,195

11 Claims.

. This invention relates to electric lighting fixtures, moreparticularly of the sewing machine illuminating type such as disclosedin U. S. Patent No. 2,067,868, of Jan. 12, 1937, and has for an objectto provide simplified and improved means to cushion theelectric'lamp-bulb so that it will not besubjected to destructivevibration. A further object of. the invention is to provide the devicewith an improved lens and reflector mounting which will preventoverheating of any of the external parts of the fixture likely tobetouched by the operator.

With the above and other objects in view, as will hereinafter appear,the invention comprises the devices, combinations, and arrangements ofparts hereinafter set forth and illustrated in the accompanying drawingsof certain specific embodiments of the invention, from which the severalfeatures of the invention and the advantages attained thereby will bereadily understood by those skilled in the art. I

In the accompanying drawings, Fig. 1 is a longitudinal sectional viewof. a lamp-socket,

socket-switch, reflector and shade assembly embodying the invention.Fig. 2 is a left end view of the device shown in Fig. 1. Fig. 2 is asection on the line 2 4, Fig. 2. Fig. 3 is a. view similar to Fig. 2with the lens, reflector and lamp-bulb removed to show the shade andlamp-socket only. Fig. 4 is an open-end view of the reflector elementonly. Fig. 5 is a face view of the lens element. Fig. 6 is a perspectiveview of the base of the lamp-socket element with its current-conductingsuspension springs. Figs. 7 and 8 are sections on the line I, I and 8,8, respectively, Fig. 1.

Fig. 9 is a longitudinal sectional view of a modification of theinvention. Fig. 10 is a left end view of the assembly shown in Fig. 9. iFig. 11 is an end view .of the shade element shown in Figs. 9 and 10,and Fig. 12 is an end view of the reflector element shown in Fig. 9.

According to the preferred embodiment of the invention, as illustratedin Figs. 1 to 83, inclusive, the socket-switch comprises a body-member iand shell 2 which are preferably molded from Bakelite or other similarphenolic condensation material. The portion of the body I extendingwithin the shell 2 is' preferably constructed substantially inaccordance with the disclosure of U. S. Patent No. 1,852,365.01? Apr. 5,1932,and supports a suitable toggle-switch mechanism such as disclosedin said last mentioned, patent. Such a toggle-switch mechanism mayinclude the pivotally movable contact-element 3, the pivoted ops-ratinglever l and the toggle-thrust member 5 which actuates the movablecontact-member 3 to make and break the circuit through the lamp 6. Inthe present instance the usual spring-pin socket-terminals are replacedby two current- 6 conducting screws 1, 1 which fixedly bind to the bodyI the ends 8, 8 of the two co-axial edgewise spiraled current-conductingleaf-springs 9, 9 the free ends III, In of. which are fixedly secured byrivets Ii l2 to the base of the Bakelite molded 10 bell-shapedlamp-receptacle and shade element l3 preferably having within its neckl3 the usual lamp-base screw-shell contact i4 andlamp-base centercontact l5 electrically engaged, respective- 13 by the rivets H and I2.15

The socket-switch body i has a skirt 16 which surrounds and encloses thesprings 9 and the neck l3 of the receptacle I3. There is, however,plenty of clearance between, the neck l3 and skirt I 6 so that thereceptacle l3 and all parts 20 carried thereby are free to moveresiliently in any 1 direction relative to the socket-switch body I.

It will be observed in Figs; 1, 6, 7 and 8 that the ends of the springs9 are squared and are received'in squared recesses in the body- I andneck i3, so that such springs are fixedly anchored at their oppositeends to the body I and neck [3' and cannot slip or rotate relatively totheir fastening screws 1 and rivets Ii, l2.

The receptacle and shade element i3 is formed at 120 spaced pointswithin its rim with inwardly projecting rim-lugs i1, Fig. 3, affordingspaced arcuate ledges ill for the similarly spaced and out-turnedrim-flanges I! of the bell-shaped sheet-metal reflector 20 which areclamped against their respective ledges l8 by the radially projectingedge-tongues 2i of the glass lens 22 held in place by the spring-wiresnap-ring 23 received in grooves 24 in the lugs l'l. One of the inwardlyprojecting rim-lugs I'I has at the ends 40 of its arcuate ledge l8opposed stop-shoulders l8, Fig. 3, which are engaged by one of theoutt-urned reflector flanges l9 and one of the lens edge-tongues II, asshown in Fig. 2 to prevent rotary slippage of the reflector and lenselements air currents may enter the three segmental spacesa,1"lgs.1and2,betweentherimsoi'theshade i8 and lens 22 and pass betweenthe reflector and shade to the exit holes II: the lamp flxture beingcustomarily used in an upright position, as shown in said U. 8. PatentNo. 2,067,888, with the light directed downwardly upon the work. Theclamp ll oi the last mentioned patented construction may be sized to fltand applied'extemally to the skirt II o! the present socket-switch forthe support of the latter.

The combined weight of the lamp 0, shade is, reflector 2| and lens 22 iscarried by the currentconducting springs I and the inertia of theseseveral elements combined serves to steady the lamp 0 against vibration;the spring-supported assembly being tiltable in any direction or movablebodily axially relative to the socket-switch body I. It is, however,flrmly supported by the springs 9, alone. u nst bodily lateral or axialtwisting movements.

In the modifled form of the device shown in Figs. 9 to 12, bothinclusive, the socket-switch body and socket-shell 21 carry the sametoggleswitchparts3,landl,asshowninFig. 1. The current-outlet screws IIand current-conducting spiral springs I! are oi the same construction asthe like parts oi Hg.- 1.

In' the present instance, however, the springs 20 support a screw-basetype of lamp receptacle II which has no shade-element combined with itand carries only the lamp 3|. The neck 32 of the sheet-metal shade 83flts snugly upon the skirt ll of the body 2' and is formed near its rimwith a circular seat II for the out-turned 120 spaced rim-flanges II ofthe reflector 31.

The reflector I1 is formed within the flanges It with seats 88 for the120 spaced radial tongues I! of the glass lens 40 which is held in placeby the spring-wire snap-ring I. This snap-ring is generally circular inform but has three outer segmental portions H which are received in thegroove 41 of the shade 33 and three inwardly oflset segmental portions44 which bear facially upon the radial tongues of the glass lens 40.

In the modifled form of the invention the lamp II and receptacle 3. onlyare supported by the current-conducting springs 29 which may be madecorrespondingly lighter in weight than the pri gs 0. a

The present construction aflords a simple, compact and sturdy yetsensitive shock-absorber for an electric lamp-socket; the lamp beingwholly spring-suspended with no contacting rigid elements to transmitvibration from the supporting body to the lamp.

It will be obvious to those skilled in the art that the invention may,without departure from its essential attributes, be embodied in variousspeciflc forms other than those shown and described, which latter are tobe considered in all respects as illustrative oi the invention and notrestrictive; reference being had to the appended claims rather than tothe foregoing description to indi-' cate the scope of the invention.

Having thus set forth the nature of the inven-- tion, what I claimherein is:-

I. In an electric lighting device, a bell-shaped lamp-shade molded frominsulating material and formed with neck and rim portions,lamp-baseengaging electrical contacts mounted within said neck-portion,a pair of current-conducting-edgewise spiraled leaf-springs supportingsaid shade by its neck and each electrically connected with a respectiveone of said lamp-base-engaging consocket-switch body, a switch-mechanismmounted thereon, a socket-shell enclosing said switchmechanism, a pairof outlet current-conductors carried by said body, a pair of co-axialcurrentconducting spiral leaf-springs connected each to a respective oneof said switch-outlet currentconductors, and a lamp-receptacle carriedby said springs and having lamp-base-engaging contacts electricallyconnected respectively to said springs, said socket-switch body having askirt enclosing said spiral leaf-springs and spaced from said lamp-basereceptacle.

4. An electric lighting device comprising a socket-switch body, aswitch-mechanism mounted thereon, a socket-shell enclosing saidswitchmechanism, a pair of outlet current-conductors carried by saidbody, a pair of co-axial currentconducting spiral leaf-springs connectedeach to a respective one of said switch-outlet currentconductors,a-bell-shaped' lamp-receptacle and shade element having a neck-portionsupported by .said springs, and lamp-base-engaging contacts in saidneck-portion electrically connected respectively to said springs.

5. An electric lighting device comprising a socket-switch body, aswitch-mechanism mounted thereon, a socket-shell enclosing saidswitchmechanism, a pair of outlet current-conductors carried by saidbody, a pair of current-conducting springs connected each to arespective one of said switch-outlet current-conductors, a bellshapedlamp-receptacle and shade element having a neck-portion supportedentirely by said springs, lamp-base-engaging contacts in saidneck-portion electrically connected respectively to said springs, andreflector and lens elements carried by said shade.

6. An electric lighting device comprising a socket-switch body, aswitch-mechanism mounted thereon, a socket-shell enclosing saidswitchtively to said springs, said shade having circumferentially spacedinwardly projecting rim-lugs, and reflector and lens elements seatedupon said rim-lugs and spaced from said shade.

'7. In an electric lighting device, a bell -shaped lamp-shade having arim-groove and a rim-seat,

a bell-shaped reflector having circumferentially' spaced out-turnedrim-flanges in engagement with said rim-seat, a lens element seated uponsaid reflector and peripherally spaced from said shade, and a wiresnap-ring engaging said lens and seated in said rim-groove.

8. A supporting body of molded electrical insulation material, a pair ofcurrent-conductors fixedly mounted therein, a lamp-receptacle having abody of molded electrical insulation material and lamp-base-engagingcontacts carried thereby, and a pair of sheet-metal current-conductingleaf-springs of edgewise spiraled form each fixed at one end to saidsupporting body and to a respective one of said current-conductorstherein and each fixed at its opposite end to the body of saidlamp-receptacle and to a respective one of said lamp-base-engagingcontacts carried thereby.

9. In a lighting device, a bell-shaped sheetmetal reflector having atthe rim of its skirt arcuate edge-portions and out-turned rim-flanges, alens having arcuate edge-portions and radial edge-tongues projectingoutwardly beyond its arcuate edge-portions and disposed in ju'xtaposition with the out-turned rim-flanges of said reflector, and abell-shaped supporting shade having seating means within its rim forsaid reflector rim-flanges and lens edge-tongues, there being arcuateventilating openings between said shade and the arcuate edge-portions ofsaid lens and reflector.

10. In a lighting device, a bell-shaped sheetmetal reflector having atthe rim of its skirt arcuate edge-portions and out-turned rimflanges, alens having arcuate'edge-portions and radial edge-tongues projectingoutwardly beyond its arcuate'edge-portions and disposed in juxtapositionwith the out-turned rim-flanges of said reflector, and a moldedbell-shaped supporting shade of electrical insulation material having aneck-portion fitted with lamp-base-engaging electrical contacts and arim-portion formed with seating means for said reflector rim-flanges andlens edgetongues, there being arcuate ventilating opening between saidshade and the arcuate edge-portions of said lens and reflector. I

11. In an electric lighting device, a lamp-base receptacle having aninsulating body and lamp- "base-engaging contacts carried thereby, apair of coaxial spiral springs each. formed as an edgewise spiraled flatstrip of spring metal and each WILFRED O. LANGILLE.

